Title: Behavior of High-Performance Concrete under Uniaxial and Biaxial Loading

Author(s): Xiaodan Ren, Weizhong Yang, Yong Zhou, and Jie Li

Publication: Materials Journal

Volume: 105

Issue: 6

Appears on pages(s): 548-558

Keywords: constitutive law; strain control; strength envelope

DOI: 10.14359/20196

Date: 11/1/2008

Abstract:
A systematic experimental research was carried out to investigate the mechanical properties of high-performance concrete (HPC). A total of 91 plate specimens were tested in four different loading conditions including uniaxial tension, uniaxial compression, biaxial compression, and tension compression with the help of a closed-loop testing machine. Uniaxial and biaxial complete stressstrain curves were obtained under a strain control loading scheme. Based on the stochastic process theory, the average curves and standard deviation curves were obtained for uniaxial loading conditions. The rehardening of concrete after having entered the softening stage was observed in this experiment. The ultimate strength envelopes in both stress and strain space were developed through parameter identification of the complete stress-strain curves. This research laid a foundation for further research on the multiaxial constitutive law of concrete.